Dedicated Server: Interactive mode runs at 35 Hz

The special 3 Hz CPU conservation mode is only for non-interactive
servers with no players on them.

doomsday/engine/portable/src/dd_loop.c

@@ -78,6 +78,7 @@ static float fps;
 static int lastFrameCount;
 static boolean firstTic = true;
 static boolean tickIsSharp = false;
+static boolean noninteractive = false;
 
 #define NUM_FRAMETIME_DELTAS    200
 static int timeDeltas[NUM_FRAMETIME_DELTAS];
@@ -110,6 +111,8 @@ int DD_GameLoopExitCode(void)
 
 int DD_GameLoop(void)
 {
+    noninteractive = ArgExists("-noinput");
+
     // Start the deng2 event loop.
     return LegacyCore_RunEventLoop(de2LegacyCore);
 }
@@ -126,7 +129,7 @@ void DD_GameLoopCallback(void)
         for(i = 1; i < DDMAXPLAYERS; ++i)
             if(ddPlayers[i].shared.inGame) count++;
 
-        LegacyCore_SetLoopRate(de2LegacyCore, count? 35 : 3);
+        LegacyCore_SetLoopRate(de2LegacyCore, count || !noninteractive? 35 : 3);
 
         runTics();